remove unnecessary regex, use encodeuri for label instead of replace

layouts/_default/_markup/render-link.html

@@ -1,4 +1,5 @@
 {{$trimmed := strings.TrimSuffix ".md" (.Destination | safeURL)}}
+{{$trimmed = replace $trimmed "%20" "-"}}
 {{$external := strings.HasPrefix $trimmed "http" }}
 {{ if $external }}
 <a href="{{ $trimmed }}" rel="noopener">{{ .Text | safeHTML }}</a>